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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SetField.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.core;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.collect.Sets;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.reflect.TypeParameter;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.google.common.reflect.TypeToken;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.Iterator;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.NavigableSet;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.TreeSet;<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>import org.jsimpledb.util.ByteReader;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.jsimpledb.util.ByteWriter;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>/**<a name="line.21"></a>
<span class="sourceLineNo">022</span> * Set field.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * @param &lt;E&gt; Java type for the set elements<a name="line.24"></a>
<span class="sourceLineNo">025</span> */<a name="line.25"></a>
<span class="sourceLineNo">026</span>public class SetField&lt;E&gt; extends CollectionField&lt;NavigableSet&lt;E&gt;, E&gt; {<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>    /**<a name="line.28"></a>
<span class="sourceLineNo">029</span>     * Constructor.<a name="line.29"></a>
<span class="sourceLineNo">030</span>     *<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * @param name the name of the field<a name="line.31"></a>
<span class="sourceLineNo">032</span>     * @param storageId field content storage ID<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * @param schema schema version<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * @param elementField this field's element sub-field<a name="line.34"></a>
<span class="sourceLineNo">035</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * @throws IllegalArgumentException if {@code storageId} is non-positive<a name="line.36"></a>
<span class="sourceLineNo">037</span>     */<a name="line.37"></a>
<span class="sourceLineNo">038</span>    @SuppressWarnings("serial")<a name="line.38"></a>
<span class="sourceLineNo">039</span>    SetField(String name, int storageId, Schema schema, SimpleField&lt;E&gt; elementField) {<a name="line.39"></a>
<span class="sourceLineNo">040</span>        super(name, storageId, schema, new TypeToken&lt;NavigableSet&lt;E&gt;&gt;() { }<a name="line.40"></a>
<span class="sourceLineNo">041</span>          .where(new TypeParameter&lt;E&gt;() { }, elementField.typeToken.wrap()), elementField);<a name="line.41"></a>
<span class="sourceLineNo">042</span>    }<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>// Public methods<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    @Override<a name="line.46"></a>
<span class="sourceLineNo">047</span>    @SuppressWarnings("unchecked")<a name="line.47"></a>
<span class="sourceLineNo">048</span>    public NavigableSet&lt;E&gt; getValue(Transaction tx, ObjId id) {<a name="line.48"></a>
<span class="sourceLineNo">049</span>        if (tx == null)<a name="line.49"></a>
<span class="sourceLineNo">050</span>            throw new IllegalArgumentException("null tx");<a name="line.50"></a>
<span class="sourceLineNo">051</span>        return (NavigableSet&lt;E&gt;)tx.readSetField(id, this.storageId, false);<a name="line.51"></a>
<span class="sourceLineNo">052</span>    }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    @Override<a name="line.54"></a>
<span class="sourceLineNo">055</span>    public &lt;R&gt; R visit(FieldSwitch&lt;R&gt; target) {<a name="line.55"></a>
<span class="sourceLineNo">056</span>        return target.caseSetField(this);<a name="line.56"></a>
<span class="sourceLineNo">057</span>    }<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>    @Override<a name="line.59"></a>
<span class="sourceLineNo">060</span>    public String toString() {<a name="line.60"></a>
<span class="sourceLineNo">061</span>        return "set field `" + this.name + "' containing " + this.elementField;<a name="line.61"></a>
<span class="sourceLineNo">062</span>    }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>// Non-public methods<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    @Override<a name="line.66"></a>
<span class="sourceLineNo">067</span>    NavigableSet&lt;E&gt; getValueInternal(Transaction tx, ObjId id) {<a name="line.67"></a>
<span class="sourceLineNo">068</span>        return new JSSet&lt;E&gt;(tx, this, id);<a name="line.68"></a>
<span class="sourceLineNo">069</span>    }<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>    @Override<a name="line.71"></a>
<span class="sourceLineNo">072</span>    NavigableSet&lt;E&gt; getValueReadOnlyCopy(Transaction tx, ObjId id) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>        return Sets.unmodifiableNavigableSet(new TreeSet&lt;E&gt;(this.getValueInternal(tx, id)));<a name="line.73"></a>
<span class="sourceLineNo">074</span>    }<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>    @Override<a name="line.76"></a>
<span class="sourceLineNo">077</span>    SetFieldStorageInfo&lt;E&gt; toStorageInfo() {<a name="line.77"></a>
<span class="sourceLineNo">078</span>        return new SetFieldStorageInfo&lt;E&gt;(this);<a name="line.78"></a>
<span class="sourceLineNo">079</span>    }<a name="line.79"></a>
<span class="sourceLineNo">080</span><a name="line.80"></a>
<span class="sourceLineNo">081</span>    @Override<a name="line.81"></a>
<span class="sourceLineNo">082</span>    void copy(ObjId srcId, ObjId dstId, Transaction srcTx, Transaction dstTx) {<a name="line.82"></a>
<span class="sourceLineNo">083</span>        final FieldType&lt;E&gt; fieldType = this.elementField.fieldType;<a name="line.83"></a>
<span class="sourceLineNo">084</span>        final NavigableSet&lt;E&gt; src = this.getValue(srcTx, srcId);<a name="line.84"></a>
<span class="sourceLineNo">085</span>        final NavigableSet&lt;E&gt; dst = this.getValue(dstTx, dstId);<a name="line.85"></a>
<span class="sourceLineNo">086</span>        final Iterator&lt;E&gt; si = src.iterator();<a name="line.86"></a>
<span class="sourceLineNo">087</span>        final Iterator&lt;E&gt; di = dst.iterator();<a name="line.87"></a>
<span class="sourceLineNo">088</span>        if (!si.hasNext()) {<a name="line.88"></a>
<span class="sourceLineNo">089</span>            dst.clear();<a name="line.89"></a>
<span class="sourceLineNo">090</span>            return;<a name="line.90"></a>
<span class="sourceLineNo">091</span>        }<a name="line.91"></a>
<span class="sourceLineNo">092</span>        if (!di.hasNext()) {<a name="line.92"></a>
<span class="sourceLineNo">093</span>            dst.addAll(src);<a name="line.93"></a>
<span class="sourceLineNo">094</span>            return;<a name="line.94"></a>
<span class="sourceLineNo">095</span>        }<a name="line.95"></a>
<span class="sourceLineNo">096</span>        E s = si.next();<a name="line.96"></a>
<span class="sourceLineNo">097</span>        E d = di.next();<a name="line.97"></a>
<span class="sourceLineNo">098</span>        while (true) {<a name="line.98"></a>
<span class="sourceLineNo">099</span>            final int diff = fieldType.compare(s, d);<a name="line.99"></a>
<span class="sourceLineNo">100</span>            boolean sadvance = true;<a name="line.100"></a>
<span class="sourceLineNo">101</span>            boolean dadvance = true;<a name="line.101"></a>
<span class="sourceLineNo">102</span>            if (diff &lt; 0) {<a name="line.102"></a>
<span class="sourceLineNo">103</span>                dst.add(s);<a name="line.103"></a>
<span class="sourceLineNo">104</span>                dadvance = false;<a name="line.104"></a>
<span class="sourceLineNo">105</span>            } else if (diff &gt; 0) {<a name="line.105"></a>
<span class="sourceLineNo">106</span>                di.remove();<a name="line.106"></a>
<span class="sourceLineNo">107</span>                sadvance = false;<a name="line.107"></a>
<span class="sourceLineNo">108</span>            }<a name="line.108"></a>
<span class="sourceLineNo">109</span>            if (sadvance) {<a name="line.109"></a>
<span class="sourceLineNo">110</span>                if (!si.hasNext()) {<a name="line.110"></a>
<span class="sourceLineNo">111</span>                    dst.tailSet(s, false).clear();<a name="line.111"></a>
<span class="sourceLineNo">112</span>                    return;<a name="line.112"></a>
<span class="sourceLineNo">113</span>                }<a name="line.113"></a>
<span class="sourceLineNo">114</span>                s = si.next();<a name="line.114"></a>
<span class="sourceLineNo">115</span>            }<a name="line.115"></a>
<span class="sourceLineNo">116</span>            if (dadvance) {<a name="line.116"></a>
<span class="sourceLineNo">117</span>                if (!di.hasNext()) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>                    dst.addAll(src.tailSet(s, true));<a name="line.118"></a>
<span class="sourceLineNo">119</span>                    return;<a name="line.119"></a>
<span class="sourceLineNo">120</span>                }<a name="line.120"></a>
<span class="sourceLineNo">121</span>                d = di.next();<a name="line.121"></a>
<span class="sourceLineNo">122</span>            }<a name="line.122"></a>
<span class="sourceLineNo">123</span>        }<a name="line.123"></a>
<span class="sourceLineNo">124</span>    }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span>    @Override<a name="line.126"></a>
<span class="sourceLineNo">127</span>    void buildIndexEntry(ObjId id, SimpleField&lt;?&gt; subField, ByteReader reader, byte[] value, ByteWriter writer) {<a name="line.127"></a>
<span class="sourceLineNo">128</span>        assert subField == this.elementField;<a name="line.128"></a>
<span class="sourceLineNo">129</span>        writer.write(reader);<a name="line.129"></a>
<span class="sourceLineNo">130</span>        id.writeTo(writer);<a name="line.130"></a>
<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
<span class="sourceLineNo">132</span>}<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>




























































</pre>
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